This Add On solves an important problem and does it really well.

The import/mapping of user attributes is well thought out. The validation/live import sequence is really useful for the often complicated task of matching different field types.

Highly recommended.

Once set up, this add-on is easy to use and really saves a lot of time. I use it with the All In export add-on, they make a powerful combination. The only reason for not having five stars is that both a user name and an email field are required to upload users. If you are moving a large number of users from some other CMS or custom setup, a user name satisfying the requirements of Concrete 5 may not be available. It would be very useful to have an auto-fill routine to assign a random unique name that the user can change when they log in.

Overall, both add-ons display nice, are easy to use and testing shows good upload of ALL the attributes you might have set up for users, both standard and custom. I also particularly like the ability to designate user groups at the upload time.